Human metagenome
Ontology highlight
ABSTRACT:
PROVIDER: PRJNA248297 | ENA |
REPOSITORIES: ENA
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Project description:A phylogenetic microarray targeting 66 families described in the human gut microbiota has been developped aud used to monitor the gut microbiota's structure and diversity. The microarray format provided by Agilent and used in this study is 8x15K. A study with a total of 4 chips was realized. Arrays 1 and 2: Hybridization with 100ng of labelled 16S rRNA gene amplicons from a mock community sample and 250ng of labelled 16S rRNA gene amplicons from 1 faecal sample. Each Agilent-030618 array probe (4441) was synthetized in three replicates. Arrays 3 and 4: Hybridization with 250ng of labelled 16S rRNA gene amplicons from 2 faecal samples. Each Agilent-40558 array probe (4441) was synthetized in three replicates.
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Project description:Objectives: Arterial hypertension (AH) influences salivary gland physiology and oral health, being associated with a higher incidence of periodontal disease in pregnant women. Evidence points to a bidirectional relationship between the oral microbiota and blood pressure regulation. Therefore, this study aimed to characterize the oral health of pregnant women and AH-associated changes in the salivary proteome and microbiome during pregnancy and postpartum. Design: Ten healthy women and ten women with AH were enrolled. Saliva was collected during pregnancy and six months postpartum. The salivary proteome was characterized by shotgun label-free mass spectrometry analysis. Specific proteins were validated through parallel reaction monitoring (PRM). The oral microbiota was characterized via 16S rRNA gene amplicon sequencing (V4 region). The periodontal health and the caries history was assessed during pregnancy. Results: Pregnant women with AH had lower junction plakoglobin (JUP)- and desmoplakin (DSP)-specific peptide levels than healthy women, confirmed by the PRM approach. The levels of these proteins correlated negatively with periodontal health indexes, which were higher in pregnant women with AH. In AH, nitrate-reducing microorganisms had lower abundance, correlating positively with JUP and DSP-specific peptides. Conclusions: The salivary proteome and microbiota are shaped by AH during and after pregnancy. Further research is required to understand the underlying mechanisms impairing oral health in AH. Data acquisition has been supported by EPIC-XS, project number 393, funded by the Horizon 2020 program of the European Union and the National Institute for Neurological Research (Programme EXCELES, ID Project No. LX22NPO5107) and the MEYS/EU project OP JAK-MULTIOMICS_CZ - Multi-omics platform for the search for biological correlates of diseases and the development of new diagnostic, preventive and therapeutic procedures (CZ.02.01.01/00/23_020/0008540).
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Project description:Chronic rhinitis (CR) is a frustrating clinical syndrome in dogs and our understanding of the disease pathogenesis in is limited. Increasingly, host-microbe interactions are considered key drivers of clinical disease in sites of persistent mucosal inflammation such as the nasal and oral cavities. Therefore, we applied next generation sequencing tools to interrogate abnormalities present in the nose of dogs with CR and compared immune and microbiome profiles to those of healthy dogs. Host nasal cell transcriptomes were evaluated by RNA sequencing, while microbial communities were assessed by 16S rRNA sequencing. Correlation analysis was then used to identify significant interactions between nasal cell transcriptomes and the nasal microbiome and how these interactions were altered in animals with CR. Notably, we observed significant downregulation of multiple genes associated with ciliary function in dogs with CR, suggesting a previously undetected role for ciliary dysfunction in this syndrome. We also found significant upregulation of immune genes related to the TNF-a and interferon pathways. The nasal microbiome was also significantly altered in CR dogs, with overrepresentation of several potential pathobionts. Interactome analysis revealed significant correlations between bacteria in the genus Porphyromonas and the upregulated host inflammatory responses in dogs with CR, as well as defective ciliary function which was correlated with Streptococcus abundance. These findings provide new insights into host-microbe interactions in a canine model of CR and indicate the presence of potentially causal relationships between nasal pathobionts and the development of nasal inflammation and ciliary dysfunction.
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